Antibiotic candidiasis can result from overuse or over-prescription of broad-spectrum antibiotics (such as oxytetracycline commonly used for the control of acne). Consequently, it is now rare for such antibiotics to be prescribed for extended periods. The apparent effect of the antibiotic is to reduce the commensal bacterial flora in the gastrointestinal tract, resulting in an environment conducive to the propagation of existing candida in the absence of any major competition. This situation may remain stable until the patient stops taking the antibiotic, when the bacterial flora re-establish and displace the candida into the genital region of the patient. This can result in redness and itching (thrush in women and dhobi itch in men) which can last for a similar period to that of the antibiotic course. The rash can be controlled or cured by a suitable antifungal drug, but the infection is likely to clear up of its own accord in due course (presumably when the original bacterial/fungal balance has been properly restored).